Compatible with any fire panel using Apollo protocol the Apollo 45681-284APO base isolator senses and detects short-circuit faults on XP95 and Discovery wiring loops.

The Isolating Base senses and isolates short circuit faults on system loops and spurs. The base is loop-powered, polarity sensitive and accepts the XPERT card to set the address of the associated device. In short-circuit conditions the integral yellow LED is illuminated. The detector associated with the base remains active under short-circuit conditions. Power and signals to the affected section are restored automatically when the fault is cleared.

Under normal operating conditions a low impedance is present between the -IN and -OUT terminals of the base so that power and signals pass to the next base in line. If a short-circuit or abnormally low impedance occurs the fall in voltage is sensed and the base isolates the negative supply in the direction of the fault. The isolated section is tested using a current pulse every five seconds. When the short-circuit is removed, the power will automatically be restored. If it is a requirement that no device is lost in the event of a single short-circuit fault every non-isolated detector should be fitted to an isolating base.

• Apollo 45681-284APO

• Up to 20 detectors or their equivalent load, may be installed between isolating bases

• High brightness LED

• Detects wiring short-circuits

• Minimises disruption from short circuits